Mounting for rock drills



Feb, 11, 1936, 5. 0. HANSEN wm MOUNTING FOR ROCK DRILLSY Filed Aug. 23, 1954 Y INVEN LfiarleSUHazzden FIQ..-2. BY Q. M

Patented F eb. 11 1936 UNITED STATES MOUNTING FOR ROCK DRILLS Charles C. Hansen, Easton, Pa., assignor to Ingersoll-Rand Company, Jersey City, N. J.,' a corporation of New Jersey Application August 23, 1934, Serial No. 741,047

2 Claims.

This invention relates to mountings, and more particularly to portable mountings for rock drills and the like.

One object of the invention is to enable that portion of the mounting which supports the rock drill to be conveniently tilted with respect to the rock face upon which the mounting rests.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawing accompanying this specification and in which similar reference characters refer to similar parts,

Figure 1 is an end elevation of a mounting constructed in accordance with the practice of the invention,

Figure 2 is a side elevation of the mounting, and

Figures 3 and 4 are transverse views taken through Figure 2 on the lines 33 and 44.

Referring more particularly to the drawing, the mounting constructed in accordance with the practice of the invention and designated, in general, by 20, comprises a support 2| consisting, in the present instance, of a pair of skids 22 which are held in spaced relation with respect to each other by cross members 23.

Near one end of the support 2| is a rod or shaft 24 which is seated in bearings 25 on the skids 22. The shaft 24 serves as a pivot for a vertical guide frame 26 consisting of a pair of side members 21, preferably of structural shape, of which the confronting legs 28 serve as guides for a rock drill 29.

The rock drill may be slidably interlocked with the guides 28, in a well known manner, and is suspended from a cable 3|) which may be trained over a sheave (not shown) near the upper extremity of the guide frame 26 and is connected to a hoist 3| on the support 2 I. Thus, as the working implement 32, which the rock drill 29 actuates, penetrates the work the hoist 30 may be operated to lower the rock drill 29 and hold it in substantially the correct striking distance with respect to the working implement. After the working implement has entered the rock to the limit of its extent the hoist may be operated to withdraw it from the drill hole.

The guide frame 26 may be connected to the shaft 24 in any convenient manner, as for instance by mounting a plate 33 near the lower ends of the side members 21 to support bearings 34 through which the shaft 24 extends. The guide frame assembly is held intermediate the ends of the shaft 24 by collars 35 secured to the shaft.

Suitable means are provided for maintaining the guide frame 26 in an upright position. That illustrated consists of a diagonal brace 36 comprising a pair of legs 31 which are pivotally connected at their upper ends to a pin 38 seated in a bearing or bearings 39 afiixed to the guide frame 26, preferably near the top of the guide frame. The legs 31 diverge in the direction of the support 2| and are provided with apertures 49 in their lower ends for the reception of pivots 4| on the ends of a bar 42.

The pivots 4| extend through slots 43 in upright guides 44 on the support 2| and having their upper ends connected by a cross brace 45. The free ends of the pivots 4| are threaded for the reception of nuts 46 whereby the bar 42 may be locked securely in any position along the length of the slots 43. Preferably guide blocks 4! are mounted on the pivots 4| to slide within guideways 48 in the inner surfaces of the guides 44.

In order to facilitate the raising and lowering of the pivots 4| to tilt the guide frame 26 to a desired degree of angularity a screw 49 is mounted, in vertical position, intermediate the guides 44. The screw is supported by a cross head 50 seated on the cross brace and is threaded through a nut 5| aflixed to the bar 42. The portion of the screw 49 extending above the cross head carries a flange 52 into which. are inserted grip members 53 for manipulation of the screw 49.

The operation of the device is as follows: Whenever, owing to the irregularities of the surface upon which the mounting rests, it be desired to adjust the angular relationship of the rock drill and its working implement with respect thereto the nuts 46 are unthreaded on the pivots 4| to enable the pivots to slide freely in the slots 43. The screw 49 is then manipulated to raise or lower the pivots 4|, depending upon the direction in which it is desired to incline the guide frame 26. After the guide frame has been tilted to the required position the nuts 46 are again tightened on the pivots 4| to hold said pivots rigidly in the guides 44.

I claim:

1. A mounting for rock drills, comprising a support, a guide frame for a rock drill pivoted to the support, a brace pivotally connected with one end to the guide frame, a pivot for the other end of the brace, and means for raising and lowering the pivot to tilt the guide frame with respect to the support.

2. A mounting for rock drills, comprising a support, a guide frame for a rock drill pivoted to the support, a brace pivotally connected with one end to the guide frame, a pivot for the other end of the brace, guides on the support for the ends of the pivot, a screw supported by the guides and threadedly connected with the pivot to raise and lower the pivot and thereby tilt the guide frame with respect to the support, and means for locking the ends of the pivot to the guides. 

